Roll made of non-woven cloth

ABSTRACT

Fiber yarns such as polyester, nylon, and acrylicare mixed with, cotton or wool and resinous finder, and heat treated to make a non-woven cloth. The non-woven cloth is cut into disc elements which are stacked onto a shaft made of steel, plastics or wood. The laminated non-woven cloth elements are axially pressed together to form a roll having a Poisson&#39;&#39;s ratio of 0.5 and a shearing stress of 1200 kg/cm2.

United States Patent 1191 1111 3,853,677 Kai Dec. 10, 1974 [54] ROLLMADE OF NON-WOVEN CLOTH 3,617,445 11/1971 Brafford 29/132 x 3,707,752l/l973 Brafford et a1. [75] Inventor: Momsh Kyoto Japan 3,710,469 1/1973Kitazawa 29/125 [73] Assignee: Toho Yogyo Co., Ltd., Kyot m 3,711,9131/1973 Galeone et a1... 29/125 Japan 3,730,794 5/1973 Ross 29/132 X [22]Filed: 1973 Primary ExaminerMayer Weinblatt [21] A l, M 320,305Assistant Examiner-Edith L. Rollins Attorney, Agent, or Firm-Kurt Kelman[30] Foreign Application Priority Data Jan. 24, 1972 Japan 47-009288[57] ABSTRACT Fiber yarns such as polyester, nylon, and acrylicare [52]US. Cl 161/36, 29/125, 29/132 mixed with, Cotton or wool and resinous fid and [51] int. Cl B21b 31/08 heat treated to make a homwoven cloth. The[58] Field of Search 29/132, 125; 161/36 woven cloth is cut into discelements which are stacked onto a shaft made of steel, plastics or wood.[56] References Clted The laminated non-woven cloth elements are axiallyUNITED STATES PATENTS pressed together to form a roll having a Poissonsratio 1,973,690 9/1934 Laden 1 29/125 Of (15 and a Shearing Stress Of1200 kg/cmz- 2,801,461 8/1967 Kusters..... 29/125 X 3,588,978 6/1971Brafford 29/132 x 2 Clams 4 Drawmg Flgul'es PM ETEL SEC] 019% BACKGROUNDOF THE INVENTION This invention relates to rolls made of non-woven clothin which high molecular material fiber yarns such as polyester, nylon,acrylic and polypropylene are bound with natural fiber yarn such asrayon, cotton and wool by a resineus binder and heat treatment. Thenonwoven cloth is cut to in a desired size, is laminated or stacked ontoa shaft made of iron, plastics or wood and is axially pressed togetherto form a roll.

It has been'desired for long time to obtain a roll of high coefficientof friction, large shearing stress, good heat-resistivity and strongoil-proofness which are all superior to those obtained by a rubber roll,in order to speed up the processing of iron manufacture, steel makingand automobile industry.

SUMMARY OF THE INVENTION According to this invention, the non-wovencloth elements pressed together to make a molded roll of a largecoefficient of friction and high shearing stress.

The coefficient of friction obtained by the nonwoven roll of theinvention is remarkably high compared with that of conventional rubberrolls. The surface hardness of the non-woven roll can be made as desireddue to the degree of compression applied when the laminated and mountednon-woven cloth elements are molded, on the basis of the elasticity ofthe material of the non-woven cloth. The construction of the nonwovencloth roll is quite uniform as well as the hardness of the roll, due tothe non-directional fiber organization of the non-woven cloth. Theheat-resistivity is good enough according to the material of thenon-woven cloth.

The representative examples of the non-woven cloths are shown asfollows:

I. A non-woven cloth is made of nylon 43 parts, cotton 18 parts,resinous binding agents 39 parts. The coefficient of water absorption is8.2 percent, the weight per unit area ZOOfiO gram/m the thickness 1.07mm and the tensile strength l5.0kg/Scm.

2. A non-woven cloth is made of nylon 28 parts, polyester 28 parts,rayon 14 parts, resinous binding agents 30 parts. The coefficient ofwater absorption is 52.6 percent, the weight per unit area 180:50 gram/mthe thickness 2.60 mm and the tensile strength 5.5 kg/Scm.

The non-woven cloth roll of subject application can be utilized inmanufacturing pinch rolls, such assnubber rolls, deflector rolls,tension bridle'rolls, wringer rolls, squeezer rolls and wiper rolls.

An embodiment of manufacturing the non-woven roll of the presentinvention is explained with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWING:

FIG. 1 shows two embodiments of an element of the non-woven cloth rollof the subject invention,

FIG. 2 is a perspective view of the non-woven cloth roll of the subjectinvention,

FIG. 3 is a schematic arrangement of rolls used for measurement of thecharacteristics of the non-woven cloth roll of the subject invention,and

FIG. 4 shows the characteristic curve of the nonwoven cloth roll of thesubject invention. cl DESCRIP- TION OF THE PREFERRED EMBODIMENTS;

In the figures, non-woven cloth elements 1 and 1' shown in FIG. 1 are of1.07 mm to 2.60 mm thickness. The elements are cut from a sheet of clothmaterial and elements 1 and 1' are laminated or stacked onto a shaft-For Pinch Roll For Oiling Roll Hardness 83 i 2 55 2 5 (JISK 630i)Poisson's ratio 0.5 0.3 Module of shearing elasticity 33 30 Coefficientof water absorption 5.8 50.6 Shearing stress l200kg/cm 680-720 The mostdistinguished features of the roll of subject invention are the largecoefficient of friction and the high shearing stress.

The large coefficient of friction is verified by using a testing machineof the type diagronmatically shown in FIG. 3. In FIG. 3, a steel plate 4of 1.2 mm thickness with palm oil painted on the surface thereof isintroduced at 5 and is taken out from an outlet 6 in the direction shownby the arrow. Two pairs of tension bridle rolls 7 and snubber rolls 8are provided between 5 and 6 and steel plate 4 is passed through thenips'defined by each associated roll 7 and 8. The magnitude of thetension at intake 5 is zero and at outlet 6 is 3.5 tons. Snubber rolls 8is pressurized with a force of 3 tons as shown by arrow. The angle ofdeflection of the steel plate is 320 and the speed of the steel platewhich passes through the rolls is 400 m/min.

The result of the test shows that the coefficient of friction in the drystate is 0.28 and that with some oil adhered it is 0.24, the differencebetween the two states being small compared with the difference of aconventional rubber roll which amouts to 0.1 under the condition thatthe coefficient of friction is 0.18 in the dry state and is 0.08 withoil adhered.

' Due to the large coefficient of friction,'the roll of the subjectinvention makes it possible to treat the steel plate or the like at ahigh speed without causing any slippage occuring in the steelmanuacturing line and any fault such as plate break or plate fold at ahigh speed which usually accompanies slippage does not exist at all.

This makes the steel manufacturing line quite compact so that the numberof rolls can be reduced in the plant.

The large coefficient of friction of the roll causes close adhesion ofthe roll to the steel plate so that when the roll is utilized as an oilsqueezer roll, in the squeez ing operation, the oil film deposited onthe steel plate is squeezed sufficiently to leave only a thickness ofthe oil film necessary for prevention of rust formation on the steel.

This elimination of excess oil film naturaly reduces the consumption ofoil and also holds the steel plate rigidly.

The result of a test in which the reduction of oil consumption isverified is shown in FIG. 4, in which the ordinate denotes the oilquantity per liter which is adhered to the steel plate in ton of steeland the abscissa denotes the time.

In the figure, the full line l denotes the resultant data of the roll ofthe subject invention and the dotted line II denotes that of aconventional rubber roll.

The curves in FIG. 4 teach that oil quantity of the steel plate squeezedis reduced from I liter/ton to 0.46 liter/ton by means of the roll ofthe subject invention, making a reduction of 64.8 kilo liter a monthwith a series of lines, in which steel plate of 120 kiloton is processeda month.

When the roll of the subject invention is used as a squeeze rollprovided in the outlet of a water washing line, the slippage due tohydroplaning phenomena does never occur because of the large coefficientof friction so that the water is squeezed from the steel plate to aremarkable extent.

In using the roll of the subject invention as an oiling roll, two kindsof rolls are combined to constitute a pair of rolls, in the combinationthe oil being applied at the inlet of the rolls and the excess part ofthe oil being squeezed at the outlet of the rolls so that any fault dueto a trace of oil appearing in the direction of advancing the steelplate at a higher processing velocity is eliminated to fully reduce therust. In other words, a pair of rolls with large coefficient of frictionwas used at the outlet to successfully improve the adhesion of the rollto the steel plate and to uniformly apply the oil onto the steel plate.

The shearing stress of the roll of the subject invention amounts, forexample, to 1,200 kg/cm as compared with 620 kg/cm obtainable in aconventional rubber roll and, therefore, no tearing off of the rollresults. This means that the full working duration of a single roll canbe extended and also the expense for changing the roll is abolished.

What we claim is:

1. In a roll comprising a shaft having an axis and a plurality ofannular disc elements of a non-woven fabric, the fabric consisting ofyarns of fibers of a high molecular synthetic resin material and ofnatural fibers, and a resinous material binding the yarns together, theelements being stacked on the shaft and axially pressed together to formthe roll, the improvement comprising the elements being heat treated andaxially pressed together so that the roll has a Poissons ratio of about0.5 and a shearing stress of about 1,200 kg/cm".

2. In the roll of claim 1, the roll having a hardness of 83: 2 and acoefficient of water absorption of about 5.8 percent.

1. IN A ROLL COMPRISING A SHAFT HAVING AN AXIS AND A PLURALITY OFANNULAR DISC ELEMENTS OF A NON-WOVEN FABRIC, THE FABRIC CONSISTING OFYARNS OF FIBERS OF A HIGH MOLECULAR SYNTHETIC RESIN MATERIAL AND OFNATURAL FIBERS, AND A RESINOUS MATERIAL BINDING THE YARNS TOGETHER, THEELEMENTS BEING STACKED ON THE SHAFT AND AXIALLY PRESSED TOGETHER TO FORMTHE ROLL, THE IMPROVEMENT COMPRISING THE ELEMENTS BEING HEAT TREATED ANDAXIALLY PRESSED TOGETHER SO THAT THE ROLL HAS A POISSON''S RATIO OFABOUT 0.5 AND A SHEARING STRESS OF ABOUT 1,200 KG/CM2.
 2. In the roll ofclaim 1, the roll having a hardness of 83* + or - 2* and a coefficientof water absorption of about 5.8 percent.